#include<stdio.h>

#include<stdlib.h>

int N1,N2,kk1,kk2,kk3

struct couse * head1

struct student * head2

struct couse//课程信息结构体

{

int num1

char name1[20]

int score

int nelepeo//课程已选人数

int Melepeo//课程人数上限

struct couse * next

}

struct student//学生信息结构体

{

int num2

char name2[20]

int nelenum[50]//已选课程编号

int nelen//已选课程数量

struct student * next

}

void Ms()

{

for(kk1=0kk1<1100kk1++)

for(kk2=0kk2<1200kk2++)

for(kk3=0kk3<1200kk3++)

}

void keyboardc()//录入课程子函数(从键盘录入)

{

struct couse *p1,*p2

N1=0

p1=p2=(struct couse*)malloc(sizeof(struct couse))

printf("课程编号\t课程名称\t学分\t课程人数上限\n")

scanf("%d%s%d%d",&p1->num1,p1->name1,&p1->score,&p1->Melepeo)

p1->nelepeo=0

head1=NULL

while(p1->num1!=0)

{

N1=N1+1

if(N1==1)head1=p1

else p2->next=p1

p2=p1

p1=(struct couse * )malloc(sizeof(struct couse))

scanf("%d%s%d%d",&p1->num1,p1->name1,&p1->score,&p1->Melepeo)

p1->nelepeo=0

}

p2->next=NULL

}

void filec()//录入键盘子函数(从文件录入)

#include<stdio.h>

#include<stdlib.h>

int N1,N2,kk1,kk2,kk3

struct couse * head1

struct student * head2

struct couse//课程信息结构体

{

int num1

char name1[20]

int score

int nelepeo//课程已选人数

int Melepeo//课程人数上限

struct couse * next

}

struct student//学生信息结构体

{

int num2

char name2[20]

int nelenum[50]//已选课程编号

int nelen//已选课程数量

struct student * next

}

void Ms()

{

for(kk1=0kk1<1100kk1++)

for(kk2=0kk2<1200kk2++)

for(kk3=0kk3<1200kk3++)

}

void keyboardc()//录入课程子函数(从键盘录入)

{

struct couse *p1,*p2

N1=0

p1=p2=(struct couse*)malloc(sizeof(struct couse))

printf("课程编号\t课程名称\t学分\t课程人数上限\n")

scanf("%d%s%d%d",&p1->num1,p1->name1,&p1->score,&p1->Melepeo)

p1->nelepeo=0

head1=NULL

while(p1->num1!=0)

{

N1=N1+1

if(N1==1)head1=p1

else p2->next=p1

p2=p1

p1=(struct couse * )malloc(sizeof(struct couse))

scanf("%d%s%d%d",&p1->num1,p1->name1,&p1->score,&p1->Melepeo)

p1->nelepeo=0

}

p2->next=NULL

}

void filec()//录入键盘子函数(从文件录入)

{

FILE * fp

char filepath[20]

struct couse *p1,*p2

N1=0

printf("输入要读入的文件路径:")

getchar()

gets(filepath)

if((fp=fopen(filepath,"r"))==NULL)

{

printf("找不到%s文件!\n",filepath)

exit(0)

}

p1=p2=(struct couse*)malloc(sizeof(struct couse))

fscanf(fp,"%d%s%d%d%d",&p1->num1,p1->name1,&p1->score,&p1->nelepeo,&p1->Melepeo)

head1=NULL

while(!feof(fp))

{

N1=N1+1

if(N1==1)head1=p1

else p2->next=p1

p2=p1

p1=(struct couse * )malloc(sizeof(struct couse))

fscanf(fp,"%d%s%d%d%d",&p1->num1,p1->name1,&p1->score,&p1->nelepeo,&p1->Melepeo)

}

p2->next=NULL

}

void inputc()//录入课程主函数

{

int i

printf("\t\t\t录入课程信息\n")

printf("\n1.从键盘录入\n")

printf("2.从文件录入\n")

printf("3.返回主菜单\n")

printf("请选择(1~3):\n")

scanf("%d",&i)

switch(i)

{

case(1):keyboardc()break

case(2):filec()break

case(3):break

}

}

void insertc(struct couse *incouse)//课程管理子函数(增加课程)

{

struct couse *p0,*p1,*p2

p1=head1

p0=incouse

if(head1==NULL)

{

head1=p0

p0->next=NULL

}

else

{

while((p0->num1 >p1->num1) &&(p1->next!=NULL))

{

p2=p1

p1=p1->next

}

if(p0->num1 <= p1->num1)

{

if(head1==p1) head1=p0

else p2->next=p0

p0->next=p1

}

else

{

p1->next=p0

p0->next=NULL

}

}

N1=N1+1

}

void delc(int num1)//课程管理子函数(删除课程)

{

struct couse *p1,*p2

if(head1==NULL)

{

printf("\n没有课程,无法删除!\n")

goto end

}

p1=head1

while(num1!=p1->num1 &&p1->next!=NULL)

{

p2=p1

p1=p1->next

}

if(num1==p1->num1)

{

if(p1==head1) head1=p1->next

else p2->next=p1->next

printf("已删除该编号课程!\n")

N1=N1-1

}

else printf("无该编号的课程!\n")

end:

}

void managementc()//课程管理主函数

{

struct couse * incouse

int i,num1

printf("\t\t\t课程管理\n")

printf("1.新增课程\n")

printf("2.删除课程\n")

printf("3.返回主菜单\n")

printf("请选择(1~3):\n")

scanf("%d",&i)

switch(i)

{

case(1):

{

incouse=(struct couse *)malloc(sizeof(struct couse))

printf("课程编号\t课程名称\t学分\t课程人数上限\n")

scanf("%d%s%d%d",&incouse->num1,incouse->name1,&incouse->score,&incouse->Melepeo)

incouse->nelepeo=0

insertc(incouse)

break

}

case(2):

{

printf("请输入要删除课程的编号:\n")

scanf("%d",&num1)

delc(num1)

break

}

case(3):break

}

}

void keyboards()//录入学生信息子函数（从键盘录入）

{

int i

struct student *p1,*p2

N2=0

p1=p2=(struct student *)malloc(sizeof(struct student))

printf("学生学号\t学生姓名\n")

scanf("%d%s",&p1->num2,p1->name2)

p1->nelen=0

for(i=0i<20i++) p1->nelenum[i]=0

head2=NULL

while(p1->num2!=0)

{

N2=N2+1

if(N2==1)head2=p1

else p2->next=p1

p2=p1

p1=(struct student * )malloc(sizeof(struct student))

scanf("%d%s",&p1->num2,p1->name2)

p1->nelen=0

for(i=0i<20i++) p1->nelenum[i]=0

}

p2->next=NULL

}

void files()//录入学生信息子函数（从文件录入）

{

int i=0

FILE * fp

char filepath[20]

struct student *p1,*p2

N2=0

printf("输入要读入的文件路径:")

getchar()

gets(filepath)

if((fp=fopen(filepath,"r"))==NULL)

{

printf("找不到%s文件!\n",filepath)

exit(0)

}

p1=p2=(struct student*)malloc(sizeof(struct student))

fread(p1,sizeof(struct student),1,fp)

head2=NULL

while(!feof(fp))

{

i=0

N2=N2+1

if(N2==1)head2=p1

else p2->next=p1

p2=p1

p1=(struct student * )malloc(sizeof(struct student))

fread(p1,sizeof(struct student),1,fp)

}

p2->next=NULL

}

void inputs()//录入学生信息主函数

{

int i

printf("\t\t\t录入学生信息\n")

printf("\n1.从键盘录入\n")

printf("2.从文件录入\n")

printf("3.返回主菜单\n")

printf("请选择(1~3):\n")

scanf("%d",&i)

switch(i)

{

case(1):keyboards()break

case(2):files()break

case(3):break

}

}

void inserts(struct student * incouse)//学生信息管理子函数(填加学生信息)

{

struct student *p0,*p1,*p2

p1=head2

p0=incouse

if(head2==NULL)

{

head2=p0

p0->next=NULL

}

else

{

while((p0->num2 >p1->num2) &&(p1->next!=NULL))

{

p2=p1

p1=p1->next

}

if(p0->num2 <= p1->num2)

{

if(head2==p1) head2=p0

else p2->next=p0

p0->next=p1

}

else

{

p1->next=p0

p0->next=NULL

}

}

N2=N2+1

}

void dels(int num2)//学生信息管理子函数（删除学生信息)

{

struct student *p1,*p2

if(head2==NULL)

{

printf("\n没有该学生信息,无法删除!\n")

goto end

}

p1=head2

while(num2!=p1->num2 &&p1->next!=NULL)

{

p2=p1

p1=p1->next

}

if(num2==p1->num2)

{

if(p1==head2) head2=p1->next

else p2->next=p1->next

printf("已删除该学生信息!\n")

N2=N2-1

}

else printf("无该学号的学生!\n")

end:

}

void managements()//学生信息管理主函数

{

struct student * incouse

int i,num2

printf("\t\t\t学生信息管理\n")

printf("1.新增学生信息\n")

printf("2.删除学生信息\n")

printf("3.返回主菜单\n")

printf("请选择(1~3):\n")

scanf("%d",&i)

switch(i)

{

case(1):

{

incouse=(struct student *)malloc(sizeof(struct student))

incouse->nelen=0

incouse->nelenum[0]=0

printf("学生学号\t学生姓名\n")

scanf("%d%s",&incouse->num2,incouse->name2)

inserts(incouse)

break

}

case(2):

{

printf("请输入要删除学生的学号:\n")

scanf("%d",&num2)

dels(num2)

break

}

case(3):break

}

}

void elect(struct student * s)//选课

{

struct couse * p

int num1,i

printf("请输入要选课的编号:\n")

scanf("%d",&num1)

for(i=0s->nelenum[i]!=0i++)

s->nelenum[i]=num1

(s->nelen)++

p=head1

while(p->num1!=num1) p=p->next

(p->nelepeo)++

}

void cheak()//学生选课子函数(查询可选课程)

{

char e

struct couse * c

struct student * s

int num2,i,j=0,t=0

printf("请输入你的学号:")

scanf("%d",&num2)

s=head2

while(s->num2!=num2 &&s->next!=NULL) s=s->next

if(s->num2!=num2)

{

printf("不存在你的信息,请进入主菜单录入你的信息!\n")

goto end

}

c=head1

printf("你的可选课程编号:\n")

while(c!=NULL)

{

for(t=0,i=0s->nelenum[i]!=0i++)

{

if(c->num1==s->nelenum[i]) t=1

}

if(t==0 &&(c->nelepeo!=c->Melepeo))

{

printf("%d\n",c->num1)

j++

}

c=c->next

}

if(j==0)

{

printf("你已选完所有课程，无法再多选!\n")

goto end

}

printf("选课(y/n)?:\n")

getchar()

e=getchar()

i=0

while(e=='y')

{

elect(s)

printf("继续选课(y/n)?:\n")

getchar()

e=getchar()

}

end:

}

void back(struct student * p)//退课

{

struct couse * p1

int num1,i,j

printf("请输入你要退掉的课程编号:\n")

scanf("%d",&num1)

p1=head1

while(p1->num1!=num1) p1=p1->next

for(i=0p->nelenum[i]!=num1i++)

for(j=ip->nelenum[j]!=0j++) p->nelenum[j]=p->nelenum[j+1]

p->nelenum[--j]=0

(p1->nelepeo)--

printf("退课成功!\n")

}

void hcheak()//学生选课子函数（查询已选课程)

{

char c

struct couse * p0

struct student * p

int num2,i,f=0

printf("请输入学号:\n")

scanf("%d",&num2)

p=head2

while(p->num2!=num2 &&p!=NULL) p=p->next

if(p==NULL)

{

printf("不存在你的信息,请回主菜单录入信息:\n")

goto end

}

printf("已选课程编号:\n")

if(p->nelenum[0]==0)

{

printf("你还没选课!\n")

goto end

}

for(i=0p->nelenum[i]!=0i++)

{

printf("%d\n",p->nelenum[i])

p0=head1

while(p0->num1!=p->nelenum[i]) p0=p0->next

f=f+p0->score

}

printf("总学分:%d\n",f)

printf("是否进行退课(y/n)?")

getchar()

c=getchar()

while(c=='y')

{

back(p)

printf("继续退课(y/n)?")

getchar()

c=getchar()

(p->nelen)--

}

end:

}

void elective()//学生选课主函数

{

int i

printf("\t\t\t学生选课\n")

printf("1.查询可选课程\n")

printf("2.查询已选课程\n")

printf("3.返回主菜单\n")

printf("请输入(1~3):\n")

scanf("%d",&i)

switch(i)

{

case(1):cheak()break

case(2):hcheak()break

case(3):break

}

}

void listc()//输出课程信息

{

struct couse * p

p=head1

printf("课程编号 课程名称 学分 课程已选人数 课程人数上限\n")

while(p!=NULL)

{

printf("%-8d%10s%6d%8d%12d\n",p->num1,p->name1,p->score,p->nelepeo,p->Melepeo)

p=p->next

}

}

void lists()//输出学生信息

{

struct student * p

p=head2

printf("学生学号 学生姓名 已选课程数量\n")

while(p!=NULL)

{

printf("%-4d %10s %6d\n",p->num2,p->name2,p->nelen)

p=p->next

}

}

void intoc()//存储课程信息

{

FILE * fp

struct couse * p

char filepath[30]

printf("输入课程信息要保存的文件路径:")

getchar()

gets(filepath)

if((fp=fopen(filepath,"w"))==NULL)

{

printf("\n保存失败!")

exit(0)

}

p=head1

while(p!=NULL)

{

fprintf(fp,"%d %s %d %d %d\n",p->num1,p->name1,p->score,p->nelepeo,p->Melepeo)

p=p->next

}

fclose(fp)

printf("课程信息已保存在%s中!\n",filepath)

}

void intos()//存储学生信息

{

FILE * fp

struct student * p

char filepath[30]

printf("输入学生信息要保存的文件路径:")

getchar()

gets(filepath)

if((fp=fopen(filepath,"w"))==NULL)

{

printf("\n保存失败!")

exit(0)

}

p=head2

while(p!=NULL)

{

fwrite(p,sizeof(struct student),1,fp)

p=p->next

}

fclose(fp)

printf("学生信息已保存在%s中!\n",filepath)

}

void into()//存储信息

{

int i

printf("1.存储课程信息\n")

printf("2.存储学生信息\n")

printf("3.返回主菜单\n")

printf("请输入(1~3)\n")

scanf("%d",&i)

switch(i)

{

case(1):intoc()break

case(2):intos()break

case(3):break

}

}

void store()//信息主函数

{

int i

printf("\t\t系统信息查看及存储\n")

printf("1.查看课程信息\n")

printf("2.查看学生信息\n")

printf("3.存储信息\n")

printf("4.返回主菜单\n")

printf("请输入(1~4):\n")

scanf("%d",&i)

switch(i)

{

case(1):listc()break

case(2):lists()break

case(3):into()break

case(4):break

}

}

int main()//主函数

{

int i

start:

printf("\n\t\t\t欢迎使用学生选课系统!\n")

printf("菜单:\n")

printf("1.录入课程信息\n")

printf("2.课程管理\n")

printf("3.录入学生信息\n")

printf("4.学生信息管理\n")

printf("5.学生选课\n")

printf("6.系统信息查看及存储\n")

printf("7.退出系统\n")

printf("\n请输入菜单选项(1~7):\n")

scanf("%d",&i)

if(i<1 || i>7)

{

printf("输入错误,请重输:\n")

goto start

}

switch(i)

{

case(1):

{

system("cls")

inputc()

goto start

break

}

case(2):

{

system("cls")

managementc()

goto start

break

}

case(3):

{

system("cls")

inputs()

goto start

break

}

case(4):

{

system("cls")

managements()

goto start

break

}

case(5):

{

system("cls")

elective()

goto start

break

}

case(6):

{

system("cls")

store()

goto start

break

}

case(7):

{

system("cls")

printf("感谢使用本系统!\n\n再见!\n")

}

}

return(0)

}